Hayley Desjardins, 12, of Saco, urgently needs a bone marrow transplant to treat her aplastic anemia, a rare and serious bone marrow failure disease that occurs when the body stops producing enough new blood cells.

Regina Martin of Woolwich swabs her cheeks during a bone marrow drive for Desjardins at the Maine Medical Center in Portland. The swabs are analyzed to register the bone marrow types of donors to a national registry.

Ashley Cox, a donor recruiter with Delete Blood Cancer, signs up volunteers during a bone marrow drive.

Dorice Groshon, left, and Allison Keith swab their cheeks during a bone marrow drive for Saco resident Hayley Desjardins.

After swabbing the insides of his checks, a volunteer deposits his swabs into a collection envelope.

Hayley Desjardins, left, has fun with her younger sister Maddison.